AC & Heater Repair in San Antonio

Quieting a Noisy Furnace

Hearing a strange sound you’re not used to hearing in your home? It could be your furnace.

While noise coming from your furnace is relatively normal, there are many parts of the complete heating system that could be causing it. Find a breakdown below so you can better address the situation:

Air noise: Air must pass through the furnace to produce heat. Therefore, hearing a little air flow now and again is quite normal. However, if the sound of air blowing is so prominent that it is keeping you up at night, you could have an air leak. Check to ensure all seams are sealed and secure open seams with duct tape when necessary.

Train noise: A dirty furnace can begin to rumble like a passing train. Any restrictions, including dirt and dust, will force your furnace to work harder than it should – thus, leading to these sounds. Check not just the furnace itself but also vents around the home. Few vents should be blocked by furniture or other enclosures.

High pitch: Have you called us for you tune-up yet? If not, that could be the reason your furnace is making a high pitch sound. A worn drive belt should be adjusted or replaced and the tension should always be properly set. Your furnace’s manual will have detailed directions on maintaining the drive belt but you can also call your technician for support.

Low pitch: A low pitch can indicate a loose furnace that needs to be better secured to the floor or wall. Replace any loose screws or braces and confirm surrounding walls are not damaged or weak.

For more on quieting a noisy furnace, click here.

At Schmidt Mechanical, we are available for your fall furnace tune-up and all other home heating needs. Call us today at (210) 361-7002 or visit our website for more information.